/*
 *  fx/TCBSpline.h
 *
 *  Copyright 2009 Peter Barth
 *
 *  This file is part of Milkytracker.
 *
 *  Milkytracker is free software: you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation, either version 3 of the License, or
 *  (at your option) any later version.
 *
 *  Milkytracker is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with Milkytracker.  If not, see <http://www.gnu.org/licenses/>.
 *
 */

#ifndef TCBSPLINE__H
#define TCBSPLINE__H

#include "Math3d.h"

class TCBSpline
{
    public:
        struct TKey
        {
            int ti;
            VectorFloat v;
            float t, c, b;
        };
    private:
        TKey* keys;

        int numKeys;

        VectorFloat getLastPos(int i);
        VectorFloat getNextPos(int i);
        VectorFloat calcTi(int i);
        VectorFloat calcTo(int i);
        int findKey(int curTime, int startIndex, int endIndex);
    public:
        TCBSpline (int numKeys);
        ~TCBSpline ();

        void setKey(int index, VectorFloat& v, int time, float tension = 0, float continuity = 0, float bias = 0);
        void setKey(int index, TKey& key) {
            if (index < numKeys) keys[index] = key;
        }
        TKey * getKey(int index) {
            if (index < numKeys) return &keys[index];else return &keys[0];
        }
        VectorFloat getPos(float curTime);

};

#endif